Author

L. Buchhave

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Preprint Sep 2026

Detecting atmospheres in the presence of stellar contamination: an empirically calibrated framework applied to four JWST/NIRSpec PRISM transits of TRAPPIST-1c

Transmission spectroscopy of rocky exoplanets orbiting late M dwarfs is limited by stellar contamination rather than photon noise. We present a framework for this contamination-dominated regime, fitting all transit epochs jointly with a Gaussian process per epoch for the time-varying stellar contamination and a single...

A. Rathcke, L. Buchhave · 0 citations

Aug 2026

2ES: updates on the Second Earth Spectrograph

We present an update on the development of the Second Earth Spectrograph (2ES), a fiber-fed, high-resolution, extreme-precision radial-velocity echelle spectrograph for the 2.2m ESO/MPG telescope at La Silla Observatory, Chile. The instrument will provide spectral coverage from approximately 370nm to 890nm at a resolvi...

J. Stürmer, L. Buchhave, S. Barboza et al. · Astronomical Telescopes + In... · 0 citations